No offense intended, but when I started competitive pistol shooting back in about 1971, I was an adherent to the "Wheel of Misfortune". I'm not an advocate of it now. I prefer to focus with a positive bent and that is instead of looking at what I did wrong, to me it is much more effective to focus on the good shots and what I did right. I then reinforce the correct fundamentals. Someone said something like, "The fundamentals of pistol shooting are simple, but difficult to apply!" One other thing that the OP said was that he was shooting a qualification course. That could indeed be that the left shots were shooter induced. One should really take one's time and try to make every shot perfect to really know if the sights need adjusting.